From the web.
Vulpex is a liquid soap based on potassium methyl cyclohexyl oleate. It is an excellent cleaning agent for masonry, textiles, leather, precious metals, ivory, paintings, and armor. It is widely known throughout the museum world as a versatile wet or dry spirit cleaner for nearly any material, from paper to
stone. The efficacy of other organic solvents in removing dirt can be increased through the addition of Vulpex. It is soluble both in water (5% solution) and organic solvents such as white spirit and 1,1,1-Trichlorethane (1% solution). Vulpex is a non-corrosive, non-foaming, non-hazardous, germicidal, non-acidic insecticidal formulation. It has a pH of 11.5.